﻿//
//  Copyright (c) 2009,2010 Liang Quan Qing.
//  All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions
//  are met:
//  1. Redistributions of source code must retain the above copyright
//     notice, this list of conditions and the following disclaimer.
//  2. Redistributions in binary form must reproduce the above copyright
//     notice, this list of conditions and the following disclaimer in the
//     documentation and/or other materials provided with the distribution.
//
//  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
//  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
//  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
//  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
//  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
//  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
//  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
//  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
//  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
//  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
//  SUCH DAMAGE.
//
//

#include <stddef.h>
#include "fastconv.h"
#include "fcnv_config.h"
#include "fcnvlocal.h"

size_t fcnv_UTF32ToUTF8(char * dest, const DChar_t * src, size_t srclen, int * pError)
{
    size_t bcount;
    size_t dcount;
    unsigned char utf8buf[8];
    int utf8len, valid, i;
    size_t length;
    DChar_t  dch;
    int error;

    length = srclen ? srclen : (dstrlen(src)+1);

    error = 0;
    for ( bcount = 0, dcount = 0 ; dcount < length ; dcount ++)
    {
        dch = src[dcount] & 0x7fffffff;
        U32CharToU8Buff_2(dch, utf8buf, &utf8len, &valid);
        ///////
        if (dest)
            for ( i = 0; i < utf8len; i++ )
                dest[bcount + i] = utf8buf[i];
        bcount += utf8len;
    }
    if (pError)
        *pError = error;

    return bcount;
}







